342128609 has 2 divisors, whose sum is σ = 342128610. Its totient is φ = 342128608.

The previous prime is 342128581. The next prime is 342128627. The reversal of 342128609 is 906821243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280663009 + 61465600 = 16753^2 + 7840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342128609 is a prime.

It is not a weakly prime, because it can be changed into another prime (342128209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171064304 + 171064305.

It is an arithmetic number, because the mean of its divisors is an integer number (171064305).

Almost surely, 2^342128609 is an apocalyptic number.

It is an amenable number.

342128609 is a deficient number, since it is larger than the sum of its proper divisors (1).

342128609 is an equidigital number, since it uses as much as digits as its factorization.

342128609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 342128609 is about 18496.7188711944. The cubic root of 342128609 is about 699.4067143090.

The spelling of 342128609 in words is "three hundred forty-two million, one hundred twenty-eight thousand, six hundred nine".